From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id BF39FC433F5 for ; Fri, 18 Mar 2022 14:14:48 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 55A088D0005; Fri, 18 Mar 2022 10:14:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4DEA58D0001; Fri, 18 Mar 2022 10:14:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 37DB08D0005; Fri, 18 Mar 2022 10:14:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 2A2EC8D0001 for ; Fri, 18 Mar 2022 10:14:48 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay13.hostedemail.com (Postfix) with ESMTP id 03F8161EBB for ; Fri, 18 Mar 2022 14:14:47 +0000 (UTC) X-FDA: 79257703056.03.95CEB1D Received: from mail-qv1-f45.google.com (mail-qv1-f45.google.com [209.85.219.45]) by imf25.hostedemail.com (Postfix) with ESMTP id D3D45A0038 for ; Fri, 18 Mar 2022 14:14:45 +0000 (UTC) Received: by mail-qv1-f45.google.com with SMTP id hu12so6524550qvb.6 for ; Fri, 18 Mar 2022 07:14:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hJ1LZFGh9JrH4kLmBili/XVhpdUQ1ROx+3aGkRwtWcI=; b=ZQyTAMy/ScpfxQEloYqrCUcFgo6qloh6qWxRiKKAtZkyPrSuLS5yTxNvKXrtfyMeXC 5qly6FgPCzATRsLI25+Q51/YesrhGC9wr1NEy+UDUqBTH1zmwVOQHfbGMLcM+RwZhwSC 5rpt8CpNTz/z+PT/JhlyjUII85wYFh+tL8KLT/7YV4W94DFaynL7nxxZzX30zsGDls3S EJJLovQHLzYpe8LlrhMKCOXe1MBd8ZWgKCTogVt04cXQ+voExMLKKYvOcx8Rd8hMJgJX vvete9Y0IByOyVxi9/pEXtK1SxEAof+jaw9+Mz/cPfuUZlWmW5SApovgM288iSUU21Td PqDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hJ1LZFGh9JrH4kLmBili/XVhpdUQ1ROx+3aGkRwtWcI=; b=M5p3RsgvGSD5wQadqTzIM0q8ReC9J618va6TP9R9KTpGM8yf7EQP4f1ccH01DlmAoz YOX3qjAjh8awWhwwI/txbGKHTZBPPVdLkInKAtrwQBK2enwB7lNl2JpTCzuwCA/Qk+bv qpCTiBOCCt9B3cAK6K2dBffcm89V7u7mWvNVrvIQ7F0gQnU4AhR2CnZpLyNnoK/dJaib pWhqtBLJw8xuDAsh9ahn8mOV/OGMXahPMW02qiGsmyyV7e+FwNSs1qfuR7vCKmgZF5zJ jWrYbbFVGa7nMuLHNs726N0AjXdcgI2wvcFTG1k+fpWqP9ZQVVAEgbtDOEsvOkJ2EWg9 jZ9A== X-Gm-Message-State: AOAM532ojkZ1Orn7o8KCBLimlYWjpslMfhwzCItULoATLIv8+uucwdx7 0OOPg+YAIywsaJFno6UShiAH0PHoHB0z6Ebpi+vB1g== X-Google-Smtp-Source: ABdhPJxvrcJRmBQ4O88N5dr023OMDX4aws1b92iUMNfld//QEeUr0i9SS+OlluqCchFGqXUdrKptwr+QUv1W5ylNiHE= X-Received: by 2002:a05:6214:2342:b0:42d:7c8b:9eac with SMTP id hu2-20020a056214234200b0042d7c8b9eacmr7144475qvb.5.1647612886526; Fri, 18 Mar 2022 07:14:46 -0700 (PDT) MIME-Version: 1.0 References: <20211214162050.660953-1-glider@google.com> <20211214162050.660953-11-glider@google.com> In-Reply-To: From: Alexander Potapenko Date: Fri, 18 Mar 2022 15:14:10 +0100 Message-ID: Subject: Re: [PATCH 10/43] kmsan: pgtable: reduce vmalloc space To: Mark Rutland Cc: Alexander Viro , Andrew Morton , Andrey Konovalov , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Christoph Hellwig , Christoph Lameter , David Rientjes , Dmitry Vyukov , Eric Dumazet , Greg Kroah-Hartman , Herbert Xu , Ilya Leoshkevich , Ingo Molnar , Jens Axboe , Joonsoo Kim , Kees Cook , Marco Elver , Matthew Wilcox , "Michael S. Tsirkin" , Pekka Enberg , Peter Zijlstra , Petr Mladek , Steven Rostedt , Thomas Gleixner , Vasily Gorbik , Vegard Nossum , Vlastimil Babka , Linux Memory Management List , Linux-Arch , LKML Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: D3D45A0038 X-Rspam-User: Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b="ZQyTAMy/"; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf25.hostedemail.com: domain of glider@google.com designates 209.85.219.45 as permitted sender) smtp.mailfrom=glider@google.com X-Stat-Signature: yye9kbw1uygw3c9odg9s79jqep178497 X-Rspamd-Server: rspam04 X-HE-Tag: 1647612885-694180 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Dec 15, 2021 at 2:36 PM Mark Rutland wrote: > > On Tue, Dec 14, 2021 at 05:20:17PM +0100, Alexander Potapenko wrote: > > KMSAN is going to use 3/4 of existing vmalloc space to hold the > > metadata, therefore we lower VMALLOC_END to make sure vmalloc() doesn't > > allocate past the first 1/4. > > > > Signed-off-by: Alexander Potapenko > > It might be worth adding an 'x86: ' prefix to the commit title, since this > specifically affects x86 headers. Makes sense, will do!